46 CFR §39.2015
Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
A fixed pressure-sensing device must be installed as close as practicable to the vessel vapor connection on a tank barge with a vapor collection system. The pressure-sensing device must measure the pressure vacuum in the main vapor collection line and have a pressure indicator located where the cargo transfer is controlled.